1
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Halcrow MA. Mix and match - controlling the functionality of spin-crossover materials through solid solutions and molecular alloys. Dalton Trans 2024; 53:13694-13708. [PMID: 39119634 DOI: 10.1039/d4dt01855a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
The influence of dopant molecules on the structure and functionality of spin-crossover (SCO) materials is surveyed. Two aspects of the topic are well established. Firstly, isomorphous inert metal ion dopants in SCO lattices are a useful probe of the energetics of SCO processes. Secondly, molecular alloys of iron(II)/triazole coordination polymers containing mixtures of ligands were used to tune their spin-transitions towards room temperature. More recent examples of these and related materials are discussed that reveal new insights into these questions. Complexes which are not isomorphous can also be co-crystallised, either as solid solutions of the precursor molecules or as a random distribution of homo- and hetero-leptic centres in a molecular alloy. This could be a powerful method to manipulate SCO functionality. Published molecular alloys show different SCO behaviours, which may or may not include allosteric switching of their chemically distinct metal sites.
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Affiliation(s)
- Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
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2
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Grunwald J, Torres J, Buchholz A, Näther C, Kämmerer L, Gruber M, Rohlf S, Thakur S, Wende H, Plass W, Kuch W, Tuczek F. Defying the inverse energy gap law: a vacuum-evaporable Fe(ii) low-spin complex with a long-lived LIESST state. Chem Sci 2023; 14:7361-7380. [PMID: 37416721 PMCID: PMC10321519 DOI: 10.1039/d3sc00561e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/25/2023] [Indexed: 07/08/2023] Open
Abstract
The novel vacuum-evaporable complex [Fe(pypypyr)2] (pypypyr = bipyridyl pyrrolide) was synthesised and analysed as bulk material and as a thin film. In both cases, the compound is in its low-spin state up to temperatures of at least 510 K. Thus, it is conventionally considered a pure low-spin compound. According to the inverse energy gap law, the half time of the light-induced excited high-spin state of such compounds at temperatures approaching 0 K is expected to be in the regime of micro- or nanoseconds. In contrast to these expectations, the light-induced high-spin state of the title compound has a half time of several hours. We attribute this behaviour to a large structural difference between the two spin states along with four distinct distortion coordinates associated with the spin transition. This leads to a breakdown of single-mode behaviour and thus drastically decreases the relaxation rate of the metastable high-spin state. These unprecedented properties open up new strategies for the development of compounds showing light-induced excited spin state trapping (LIESST) at high temperatures, potentially around room temperature, which is relevant for applications in molecular spintronics, sensors, displays and the like.
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Affiliation(s)
- Jan Grunwald
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
| | - Jorge Torres
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena 07743 Jena Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
| | - Lea Kämmerer
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Manuel Gruber
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Sebastian Rohlf
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany
| | - Sangeeta Thakur
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Heiko Wende
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena 07743 Jena Germany
| | - Wolfgang Kuch
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Felix Tuczek
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
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3
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Khakina EA, Denisov GL, Nikovskii IA, Polezhaev AV, Nelyubina YV. Spin State of the Cobalt(II) Complex with N,N'-Disubstituted 2,6-Bis(pyrazol-3-yl)pyridine. RUSS J COORD CHEM+ 2022. [DOI: 10.1134/s1070328422060021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Zheng H, Wang X, Li X, Wang C, Liu J. Spin-crossover in a trinuclear [Fe3(4-C3trz)6(H2O)6] (ClO4)] compound. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Scarpi-Luttenauer M, Mobian P, Barloy L. Synthesis, structure and functions of discrete titanium-based multinuclear architectures. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214439] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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6
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Pai T, Stefanczyk O, Kumar K, Mathonière C, Sieklucka B, Ohkoshi SI. Experimental and theoretical insights into the photomagnetic effects in trinuclear and ionic Cu( ii)–Mo( iv) systems. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01469b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New ionic and trinuclear copper(ii)–octacyanidomolybdate(iv) systems were developed and tested experimentally and theoretically to improve understanding of the photomagnetic effects.
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Affiliation(s)
- TingYun Pai
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Olaf Stefanczyk
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kunal Kumar
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Corine Mathonière
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Shin-ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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7
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Galadzhun I, Kulmaczewski R, Cespedes O, Halcrow MA. Iron/2,6‐Di(pyrazol‐1‐yl)pyridine Complexes with a Discotic Pattern of Alkyl or Alkynyl Substituents. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Iurii Galadzhun
- School of Chemistry University of Leeds Woodhouse Lane Leeds LS2 9JT UK
| | | | - Oscar Cespedes
- School of Physics and Astronomy University of Leeds EC Stoner Building Leeds LS2 9JT UK
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8
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Natke D, Preiss A, Klimke S, Shiga T, Boca R, Ohba M, Oshio H, Renz F. Structural, Magnetic, and Electrochemical Characterization of Iron(III) and Cobalt Complexes with Penta‐N
3
O
2
‐dentate Ligands. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Dominik Natke
- Institute of Inorganic Chemistry Leibniz University Hannover Callinstraße 9 30167 Hannover Germany
| | - Annika Preiss
- Institute of Inorganic Chemistry Leibniz University Hannover Callinstraße 9 30167 Hannover Germany
| | - Stephen Klimke
- Institute of Inorganic Chemistry Leibniz University Hannover Callinstraße 9 30167 Hannover Germany
| | - Takuya Shiga
- Graduate School of Pure and Applied Sciences University of Tsukuba Tennodai Tsukuba Ibaraki 305-8577 Japan
| | - Roman Boca
- Institute of Inorganic Chemistry Slovak University of Technology Bratislava SK-81237 Slovakia
- Department of Chemistry (FPV) University of SS Cyril and Methodius 91701 Trnava Slovakia
| | - Masaaki Ohba
- Department of Chemistry Faculty of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Hiroki Oshio
- Graduate School of Pure and Applied Sciences University of Tsukuba Tennodai Tsukuba Ibaraki 305-8577 Japan
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Rd. 116024 Dalian China
| | - Franz Renz
- Institute of Inorganic Chemistry Leibniz University Hannover Callinstraße 9 30167 Hannover Germany
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9
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Tanaka T, Sunatsuki Y, Suzuki T. Iron(II) Complexes Having Dinuclear Mesocate or Octanuclear Bicapped Trigonal Prism Structures Dependent on the Rigidity of Bis(bidentate) Schiff Base Ligands Containing Imidazole Groups. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tsubasa Tanaka
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - Yukinari Sunatsuki
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - Takayoshi Suzuki
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
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10
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Stefańczyk O, Ohkoshi SI. Synthesis of Two-Dimensional Photomagnetic K4{[CuII(ida)]2[MIV(CN)8]}·4H2O (MIV = Mo, W) Materials. Inorg Chem 2020; 59:4292-4299. [DOI: 10.1021/acs.inorgchem.9b03076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olaf Stefańczyk
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shin-ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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11
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Ossinger S, Näther C, Buchholz A, Schmidtmann M, Mangelsen S, Beckhaus R, Plass W, Tuczek F. Spin Transition of an Iron(II) Organoborate Complex in Different Polymorphs and in Vacuum-Deposited Thin Films: Influence of Cooperativity. Inorg Chem 2020; 59:7966-7979. [PMID: 32036663 DOI: 10.1021/acs.inorgchem.9b03354] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two polymorphic modifications (1-I and 1-II) of the new spin crossover (SCO) complex [Fe{H2B(pz)(pypz)}2] (pz = pyrazole, pypz = pyridylpyrazole; 1) were prepared and investigated by differential scanning calorimetry (DSC), magnetic measurements, Mößbauer, vibrational, and absorption spectroscopy as well as single-crystal and X-ray powder diffraction. DSC measurements reveal that upon heating the thermodynamically metastable form 1-II to ∼178 °C it transforms into 1-I in an exothermic reaction, which proves that these modifications are related by monotropism. Both forms show thermal SCO with T1/2 values of 390 K (1-II) and 270 K (1-I). An analysis of the crystal structures of 1-II and the corresponding Zn(II) (2) and Co(II) (3) complexes that are isotypic with 1-I reveals that form II consists of dimers coupled by strong intramolecular π···π interactions, which is not the case for 1-I. In agreement with these findings, investigations of thin films of 1, where significant π···π interactions should be absent, reveal SCO behavior similar to that of 1-I. These results underscore the importance of cooperativity for the spin-transition behavior of this class of complexes.
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Affiliation(s)
- Sascha Ossinger
- Institute of Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Str.2, 24118 Kiel, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Str.2, 24118 Kiel, Germany
| | - Axel Buchholz
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University, 07743 Jena, Germany
| | - Marc Schmidtmann
- Institute for Chemistry, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
| | - Sebastian Mangelsen
- Institute of Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Str.2, 24118 Kiel, Germany
| | - Rüdiger Beckhaus
- Institute for Chemistry, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
| | - Winfried Plass
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University, 07743 Jena, Germany
| | - Felix Tuczek
- Institute of Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Str.2, 24118 Kiel, Germany
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12
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Boström HLB, Cairns AB, Liu L, Lazor P, Collings IE. Spin crossover in the Prussian blue analogue FePt(CN)6 induced by pressure or X-ray irradiation. Dalton Trans 2020; 49:12940-12944. [DOI: 10.1039/d0dt02036b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pressure and X-ray irradiation induced spin crossover is found in Prussian blue analogue FePt(CN)6.
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Affiliation(s)
- Hanna L. B. Boström
- Department of Chemistry—Ångström Laboratory
- Uppsala University
- 751 21 Uppsala
- Sweden
| | - Andrew B. Cairns
- Department of Materials
- Imperial College London
- Royal School of Mines
- UK
| | - Lei Liu
- Department of Earth Sciences
- Uppsala Universitet
- Uppsala
- Sweden
| | - Peter Lazor
- Department of Earth Sciences
- Uppsala Universitet
- Uppsala
- Sweden
| | - Ines E. Collings
- Centre of X-ray Analytics
- Empa – Swiss Federal Laboratories for Materials Science and Technology
- 8600 Dübendorf
- Switzerland
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13
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Berdiell IC, Hochdörffer T, Desplanches C, Kulmaczewski R, Shahid N, Wolny JA, Warriner SL, Cespedes O, Schünemann V, Chastanet G, Halcrow MA. Supramolecular Iron Metallocubanes Exhibiting Site-Selective Thermal and Light-Induced Spin-Crossover. J Am Chem Soc 2019; 141:18759-18770. [DOI: 10.1021/jacs.9b08862] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Tim Hochdörffer
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | | | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Namrah Shahid
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Juliusz A. Wolny
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | - Stuart L. Warriner
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Oscar Cespedes
- School of Physics and Astronomy, EC Stoner Building, University of Leeds, Leeds LS2 9JT, U.K
| | - Volker Schünemann
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | | | - Malcolm A. Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
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14
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Gardinier JR, Meise KJ, Jahan F, Wang D, Lindeman SV. Selective Isomer Formation and Crystallization-Directed Magnetic Behavior in Nitrogen-Confused C-Scorpionate Complexes of Fe(O 3SCF 3) 2. Inorg Chem 2019; 58:8953-8968. [PMID: 31247826 DOI: 10.1021/acs.inorgchem.8b03454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complex [Fe(HL*)2](OTf)2, 1, where HL* = bis(3,5-dimethylpyrazol-1-yl)(3-1H-pyrazole)methane, was prepared in order to compare its magnetic properties with those of the analogous parent complex, [Fe(HL)2](OTf)2, that lacks methyl groups on pyrazolyl rings and that undergoes spin crossover (SCO) from the low spin (LS) to the high spin (HS) form above room temperature. It was anticipated that this new semibulky derivative should favor the HS state and undergo SCO at a lower temperature range. During this study, six crystalline forms of 1 were prepared by controlling the crystallization conditions. Thus, when reagents are combined in CH3CN, an equilibrium mixture of cis and trans isomers is established that favors the latter below 311 K. The trans isomer can be isolated exclusively as a mixture of solvates, LS trans-1·2CH3CN and HS trans-1·4CH3CN, by cooling CH3CN solutions to -20 °C with the former being favored at high concentrations and short crystallization times. Subsequently, vapor diffusion of Et2O into CH3CN solutions of pure trans-1·2CH3CN gives solvate-free HS trans-1. Subjecting trans-1·2CH3CN to vacuum at room temperature gives microcrystalline trans-1·CH3CN, identified by elemental analysis and its distinct powder X-ray diffraction pattern. If an isomeric mixture of 1 is subject to room-temperature vapor diffusion, then a crystalline mixture of HS isomers cis-1 and trans-1 is obtained. Finally, slowly cooling hot acetonitrile solutions of isomeric mixtures of 1 to room temperature gives large prisms of HS co-1, a species with both cis and trans isomers in the unit cell. The complexes trans-1, trans-1·CH3CN, cis-1, and co-1 undergo SCO below 250 K while trans-1·xCH3CN (x = 2, 4) solvates do not undergo SCO before desolvation.
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Affiliation(s)
- James R Gardinier
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201-1881 , United States
| | - Kristin J Meise
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201-1881 , United States
| | - Fathiya Jahan
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201-1881 , United States
| | - Denan Wang
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201-1881 , United States
| | - Sergey V Lindeman
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201-1881 , United States
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15
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Slimani A, Boukheddaden K. An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core-shell spin-crossover nanoparticles. Phys Chem Chem Phys 2018; 20:28583-28591. [PMID: 30403228 DOI: 10.1039/c8cp05578e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The development of heterostructure materials may lead to new features that cannot be obtained with natural materials. Here we simulate a model structurally hybrid core-shell nanoparticle with different lattice parameters between an electronically inert shell and an active spin crossover core. The nanoparticle consists of a 2D core with 20 × 20 size with square symmetry, surrounded by a shell made of 10 atomic layers. The low temperature photoexcitation of the core shows a significant environment-dependent behavior. In particular, we demonstrate that a shell with a large lattice parameter accelerates the low-spin to high-spin photoexcitation process of the core through the single domain nucleation mechanism while a moderate shell lattice parameter leads to spatially-homogeneous growth of the high-spin fraction. We found that the mechanical retro-action of the shell may cause elastic instability of the core leading to efficient control and manipulation of its photo-conversion.
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Affiliation(s)
- Ahmed Slimani
- Laboratoire des Matériaux Multifonctionnels et Applications, Département de physique, Faculté des Sciences de Sfax, Université de Sfax, Route de la Soukra km 3.5 - B.P. n 1171 - 3000, Sfax, Tunisia.
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16
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Drath O, Boskovic C. Switchable cobalt coordination polymers: Spin crossover and valence tautomerism. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.025] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Lathion T, Guénée L, Besnard C, Bousseksou A, Piguet C. Deciphering the Influence of Meridional versus Facial Isomers in Spin Crossover Complexes. Chemistry 2018; 24:16873-16888. [PMID: 30171722 DOI: 10.1002/chem.201804161] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Indexed: 11/08/2022]
Abstract
Chelate coordination of non-symmetrical didentate pyrazine-benzimidazole (L1) or pyridine-benzimidazole (L2) N-donor ligands around divalent iron in acetonitrile produces stable homoleptic triple-helical spin crossover [Fe(Lk)3 ]2+ complexes existing as mixtures of meridional (C1 -symmetry) and facial (C3 -symmetry) isomers in slow exchange on the NMR timescale. The speciation deviates from the expected statistical ratio mer/fac=3:1, a trend assigned to the thermodynamic trans-influence, combined with solvation effects. Consequently, the observed spin state FeII low-spin ↔FeII high-spin equilibria occurring in [Fe(Lk)3 ]2+ refer to mixtures of complexes in solution, an issue usually not considered in this field, but which limits rational structure-properties correlations. Taking advantage of the selective and quantitative formation of isostructural facial isomers in non-constrained related spin crossover d-f helicates (HHH)-[LnFe(Lk)3 ]5+ (Ln is a trivalent lanthanide, Lk=L5, L6), we propose a novel strategy for assigning pertinent thermodynamic driving forces to each spin crossover triple-helical isomer. The different enthalpic contributions to the spin state equilibrium found in mer-[Fe(Lk)3 ]2+ and fac-[Fe(Lk)3 ]2+ reflect the Fe-N bond strengths dictated by the trans-influence, whereas a concomitant solvent-based entropic contribution reinforces the latter effect and results in systematic shifts of the spin crossover transitions toward higher temperature in the facial isomers.
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Affiliation(s)
- Timothée Lathion
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, 1211, Geneva 4, Switzerland
| | - Azzedine Bousseksou
- Laboratory of Coordination Chemistry (LCC), CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, Toulouse, 31077 Cedex 4, France
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai E. Ansermet, 1211, Geneva 4, Switzerland
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18
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Tumanov SV, Veber SL, Greatorex S, Halcrow MA, Fedin MV. Interplay between Dopant Species and a Spin-Crossover Host Lattice during Light-Induced Excited-Spin-State Trapping Probed by Electron Paramagnetic Resonance Spectroscopy. Inorg Chem 2018; 57:8709-8713. [DOI: 10.1021/acs.inorgchem.8b01096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sergey V. Tumanov
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| | - Sergey L. Veber
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| | - Sam Greatorex
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Malcolm A. Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Matvey V. Fedin
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
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19
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Stefańczyk O, Pełka R, Majcher AM, Mathonière C, Sieklucka B. Irradiation Temperature Dependence of the Photomagnetic Mechanisms in a Cyanido-Bridged CuII2MoIV Trinuclear Molecule. Inorg Chem 2018; 57:8137-8145. [DOI: 10.1021/acs.inorgchem.8b00545] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olaf Stefańczyk
- CNRS, ICMCB, UPR 9048, 87 Avenue du Docteur Schweitzer, F−33608 Pessac, France
- University Bordeaux, ICMCB, UPR 9048, 87 Avenue du Docteur Schweitzer, F−33608 Pessac, France
- Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, 30−387 Kraków, Poland
| | - Robert Pełka
- Polish Academy of Science, H. Niewodniczański Institute of Nuclear Physics PAN, Radzikowskiego 152, 31−342 Kraków, Poland
| | - Anna M. Majcher
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Krakow, Łojasiewicza 11, 30−348 Kraków, Poland
| | - Corine Mathonière
- CNRS, ICMCB, UPR 9048, 87 Avenue du Docteur Schweitzer, F−33608 Pessac, France
- University Bordeaux, ICMCB, UPR 9048, 87 Avenue du Docteur Schweitzer, F−33608 Pessac, France
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, 30−387 Kraków, Poland
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20
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Levchenko GG, Berezhnaya LV, Filimonov GG, Han W. Charge Transfer, Change of the Spin Value, and Driving of Magnetic Order by Pressure in Bimetallic Molecular Complexes. J Phys Chem B 2018; 122:6846-6853. [DOI: 10.1021/acs.jpcb.8b03388] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Georgiy G. Levchenko
- International Center of Future Science, State Key Laboratory of Superhard Materials, Jilin University, Changchun, China
- Donetsk Institute for Physics and Engineering Named after O. O. Galkin, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Lyudmila V. Berezhnaya
- Donetsk Institute for Physics and Engineering Named after O. O. Galkin, Donetsk, Ukraine
| | | | - Wei Han
- International Center of Future Science, State Key Laboratory of Superhard Materials, Jilin University, Changchun, China
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21
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Abstract
Switching magnetic properties have attracted a wide interest from inorganic chemist for the objectives of information storage and quantum computing at the molecular level. This review is focused on magnetic switches based on a mechanical motion, which is an innovative approach. Three main strategies to control magnetic properties by a mechanical motion have been developed in the literature and will be described. The first one (ligand-induced spin change) consists in modulating the ligand field strength by a configuration change of the ligand in spin-crossover complexes. The second one (coordination-induced spin-state switching) is based on a change in the coordination number of a metallic center that is triggered by the motion of one ligand. The third one uses the modulation of the exchange interaction between two spin-centers by a mechanical motion.
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22
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Bridonneau N, Quatremare P, von Bardeleben HJ, Cantin J, Pillet S, Bendeif E, Marvaud V. Direct Evidence of a Photoinduced Electron Transfer in Diluted “Molybdenum‐Copper” Molecular Compounds. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700983] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nathalie Bridonneau
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
| | - Pierre Quatremare
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
| | | | - Jean‐Louis Cantin
- INSP‐CNRS‐UMR‐7588 UPMC‐Univ. Paris 6 4 place Jussieu 75252 Paris Cedex 05 France
| | | | | | - Valérie Marvaud
- IPCM‐CNRS‐UMR‐8232 UPMC‐Univ. Paris 6, cc 229 4 place Jussieu 75252 Paris Cedex 05 France
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23
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Smeets V, Wolff M, Wolny JA, Schünemann V, Dîrtu MM, Ge J, Vanacken J, Moshchalkov V, Garcia Y. Spin State Crossover, Vibrational, Computational, and Structural Studies of Fe
II
1‐Isopropyl‐1
H
‐tetrazole Derivatives. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Valentin Smeets
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université catholique de Louvain Place Louis Pasteur 1 1348 Louvain‐la‐Neuve Belgium
| | - Mariusz Wolff
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université catholique de Louvain Place Louis Pasteur 1 1348 Louvain‐la‐Neuve Belgium
- Institute of Chemistry University of Silesia 9th Szkolna Street Katowice Poland
| | - Juliusz A. Wolny
- Department of Physics University of Kaiserslautern 67663 Kaiserslautern Germany
| | - Volker Schünemann
- Department of Physics University of Kaiserslautern 67663 Kaiserslautern Germany
| | - Marinela M. Dîrtu
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université catholique de Louvain Place Louis Pasteur 1 1348 Louvain‐la‐Neuve Belgium
| | - Jun‐Yi Ge
- Solid State Physics and Magnetism Section Katholieke Universiteit Leuven Celestijnenlaan 200d 3001 Leuven Belgium
| | - Johan Vanacken
- Solid State Physics and Magnetism Section Katholieke Universiteit Leuven Celestijnenlaan 200d 3001 Leuven Belgium
| | - Victor Moshchalkov
- Solid State Physics and Magnetism Section Katholieke Universiteit Leuven Celestijnenlaan 200d 3001 Leuven Belgium
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université catholique de Louvain Place Louis Pasteur 1 1348 Louvain‐la‐Neuve Belgium
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24
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Francisco TM, Gee WJ, Shepherd HJ, Warren MR, Shultz DA, Raithby PR, Pinheiro CB. Hard X-ray-Induced Valence Tautomeric Interconversion in Cobalt-o-Dioxolene Complexes. J Phys Chem Lett 2017; 8:4774-4778. [PMID: 28910116 DOI: 10.1021/acs.jpclett.7b01794] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Valence tautomeric interconversion (VTI) is a reversible process occurring in metal complexes in which an intramolecular metal-ligand electron transfer is accompanied by a change of metal ion spin state, creating two switchable electronic states (redox isomers). Herein, we describe the low-temperature, 30-100 K, single-crystal study of the [Co(diox)2(4-CN-py)2]·benzene complex (1) (diox = 3,5-di-t-butylsemiquinonate (SQ•-) and/or 3,5-di-t-butylcatecholate (Cat2-) radical; 4-CN-py = 4-cyano-pyridine) using hard synchrotron X-ray radiation with different intensities. We demonstrate for the first time that hard X-rays can induce VTI, and that the interconversion molar fraction is dependent on both intensity and exposure time. This in turn shows that X-rays, as a probe, might be altering the very nature of many structures under investigation at low temperatures, and consequently their properties. Our findings add new perspectives to VTI studies and might be of significant interest to the entire community investigating photoresponsive complexes.
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Affiliation(s)
- Thiago M Francisco
- Physics Department, Federal University of Minas Gerais , Belo Horizonte, 31270-901, Brazil
| | - William J Gee
- School of Physical Sciences, University of Kent , Canterbury CT2 7NZ, United Kingdom
| | - Helena J Shepherd
- School of Physical Sciences, University of Kent , Canterbury CT2 7NZ, United Kingdom
| | - Mark R Warren
- Diamond Light Source, Ltd. , Harwell Science & Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - David A Shultz
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695, United States
| | - Paul R Raithby
- Department of Chemistry, University of Bath , Bath BA2 7AY, United Kingdom
| | - Carlos B Pinheiro
- Physics Department, Federal University of Minas Gerais , Belo Horizonte, 31270-901, Brazil
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25
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Barskaya IY, Veber SL, Suturina EA, Sherin PS, Maryunina KY, Artiukhova NA, Tretyakov EV, Sagdeev RZ, Ovcharenko VI, Gritsan NP, Fedin MV. Spin-state-correlated optical properties of copper(ii)–nitroxide based molecular magnets. Dalton Trans 2017; 46:13108-13117. [DOI: 10.1039/c7dt02719b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pronounced thermochromism of copper(ii)–nitroxide based molecular magnets is explained.
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Affiliation(s)
| | - Sergey L. Veber
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | | | - Peter S. Sherin
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | - Kseniya Yu. Maryunina
- Graduate School of Science and Center for Chiral Science
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | | | | | | | | | - Nina P. Gritsan
- Novosibirsk State University
- 630090 Novosibirsk
- Russia
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk
| | - Matvey V. Fedin
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
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